RS232 receive buffer

Is RS232 communication handled by hardware (UART) or software in the DigiConnectME? And how large is the receive buffer?

I’m having troubles with my application: it sometimes doesn’t receive all characters. I think this some kind of buffering problem.

(I also attached a PC with HyperTerminal to the same RS232 sender and the PC does receive all characters).

I am having the exact same issue. Did you ever figure out the problem?